I wanted to use my 3D printer draw although I was not happy with the softwares. I wrote a python script which converts vector graphics into g-code, instructions which tell my 3D printer where to put the pen down and where to move. This allowed me to use my 3D printer as a DIY pen plotter.

You can download the source code for this project here:
https://github.com/SaturnOperator/GEncoder